Definition of four o'clock in English English dictionary
The start of the fifth hour of the day in both the 12-hour and the 24-hour clock; 4: 00
(Botanik, Bitkibilim) Any of several plants of the genus Mirabilis having flowers that open in late afternoon. (hyponym) common four-o'clock, marvel-of-Peru, Mirabilis jalapa, Mirabilis uniflora
any of several plants of the genus Mirabilis having flowers that open in late afternoon
Any of several plants, of the genus ''Mirabilis, whose funnel-shaped flowers open in late afternoon
Ornamental perennial plant (Mirabilis jalapa; family Nyctaginaceae), also called marvel-of-Peru or beauty-of-the-night, native to the tropical New World. It is a quick-growing species up to 3 ft (1 m) tall, with oval leaves on short leafstalks. The stems are swollen at the joints. The plant is called four-o'clock because its flowers, which vary from white and yellow to shades of pink and red, sometimes streaked and mottled, open in late afternoon (and close by morning)